RHSA-2006:0710 - Security Advisory

Synopsis

Type/Severity

Topic

Updated kernel packages that fix several security issues in the Red HatEnterprise Linux 3 kernel are now available.

This security advisory has been rated as having important security impactby the Red Hat Security Response Team.

Description

The Linux kernel handles the basic functions of the operating system.

These new kernel packages contain fixes for the security issues describedbelow:

a flaw in the IPC shared-memory implementation that allowed a local userto cause a denial of service (deadlock) that resulted in freezing thesystem (CVE-2006-4342, Important)

an information leak in the copy_from_user() implementation on s390 ands390x platforms that allowed a local user to read arbitrary kernel memory(CVE-2006-5174, Important)

a flaw in the ATM subsystem affecting systems with installed ATMhardware and configured ATM support that allowed a remote user to causea denial of service (panic) by accessing socket buffer memory after ithas been freed (CVE-2006-4997, Moderate)

a directory traversal vulnerability in smbfs that allowed a local userto escape chroot restrictions for an SMB-mounted filesystem via "..\\"sequences (CVE-2006-1864, Moderate)

a flaw in the mprotect system call that allowed enabling write permissionfor a read-only attachment of shared memory (CVE-2006-2071, Moderate)

a flaw in the DVD handling of the CDROM driver that could be usedtogether with a custom built USB device to gain root privileges(CVE-2006-2935, Moderate)

In addition to the security issues described above, a bug fix for a clockskew problem (which could lead to unintended keyboard repeat under X11)was also included. The problem only occurred when running the 32-bit x86kernel on 64-bit dual-core x86_64 hardware.

Note: The kernel-unsupported package contains various drivers and modulesthat are unsupported and therefore might contain security problems thathave not been addressed.

All Red Hat Enterprise Linux 3 users are advised to upgrade their kernelsto the packages associated with their machine architecture andconfigurations as listed in this erratum.

Solution

Before applying this update, make sure all previously released erratarelevant to your system have been applied.

This update is available via Red Hat Network. To use Red Hat Network,launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriateRPMs being upgraded on your system.